Reply With Quotethe pics are so small but from what i can see.. i would say yes... seems to have external gills on it.. which actually makes it a damselfly.
Couldn't sleep last night, was watching the tank at 2am, saw something strange with white body and white pair of eyes. Caught it and took it out from tank just now.
Is it harmful to my shrimps? could it be because of this that i find casualties in my tank almost one everyday?
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Yippie!! Reptiles and Fishies!
the pics are so small but from what i can see.. i would say yes... seems to have external gills on it.. which actually makes it a damselfly.
Yes.. that is damselfly and will turn in to dragonfly one day.
Err..damselfly is damselfly and dragonfly is dragonfly.
They're a totally different insect.
Damselfly will NOT turn into a dragonfly.
SuD
Last edited by Wackytpt; 8th Jun 2007 at 12:01. Reason: Remove immediate quo
is damselfy nymph..sometime call dragonfly nymph because they are close relative. Anyway, please monitor closely. I once have this bugger in my tank, many cherries, tiger shrimp, shrimplets and one OTO falls into its victim.
And yes, that is the reason for your mysterious shrimp death. If there isnt anymore, then the death will stop.
someone told me its ok and it wont harm the shrimps... guess i have to monitor the tank very closely from now on...
Thank you skysky.. You have just save my shrimps's life
Last edited by Wackytpt; 8th Jun 2007 at 12:01. Reason: language
Info on damselfly nymphs:
http://www.bugsurvey.nsw.gov.au/html...tol_da-ny.html
http://www.bcadventure.com/adventure...amselfly.phtml
Dragonfly nymphs:
http://www.bugsurvey.nsw.gov.au/html...l_dr-ny-a.html
Comparison:
http://web.ukonline.co.uk/conker/pond-dip/nymphs.htm
http://www.naturegrid.org.uk/biodive.../dragnfly.html
Google is your best friend
It is quite a nightmare to have such buggers in the tank. One of the forumer has about 7-8 of these in his tank. Luckily i have only one. It will depends on how the thing get into your tank in the 1st place.
A)If the insect lay eggs directly in your tank then you are in trouble, as they lay many eggs each time. and the nymph can stay in the tank for up to 1 year. If you stay high rise, then this is quite unlikely as they cant fly beyond 2, 3 storey high.
B)Hopefully, the nymph came with the plant you brought. try to recall when is the last time you add a new plant and when the mysterious death start. If it starts immediately after you add the plants then likely it attached itself on your plant and ended in the tank.This case usually, the nymphs is one or 2 only.
C)Lastly, it came with your plants in egg form..then likely the bundle of eggs will hatch into many nymphs. This is also a bad bad news. Usually for this case the mysterious death will start sometime say 1 or 2 weeks after you add a new plant.
You can see which is likely to be case. And hopefully you can remove all of them ASAP.
Do keep us posted
regards
Last edited by Wackytpt; 8th Jun 2007 at 12:02.
if it came with your plants in egg form, you can forget about catching it. just take out everything and rescape that would help and at most, only some of your shrimp might die.. good luck bro =)
Last edited by Quixotic; 11th Jun 2007 at 11:50. Reason: SMS lingo!
I took the whole plant out yesterday, the nymph was below the bog wood(with Java fern) which i bought 2 weeks ago. I believe the nymph came with the plant i bought from some LFS. I live in 9th floor, and the tank is in my room, dont think the insect can lay egg by flying to 9th floor, and to my room that is almost impossible for them to fly in.By the way, the nymph can swim real fast.
I am worry that it comes in egg form, but so far i can only see one nymph, i hope there is no eggs with the wood.
Will alarm for help if i see one or more of them appear in my tank : )
Thanks for sharing.
Yippie!! Reptiles and Fishies!
Want to bet?Originally Posted by skysky
dont want to bet, you are the expert here.
anyway , he stay in 9th floor. unlikely
Correct me if I am wrong but I do see the so call damselfly turn into dragonfly in my 2ft tank.
Last edited by Quixotic; 11th Jun 2007 at 11:51. Reason: Spelling
Don't be afraid of my duck!
The aquatic insect is a damselfly larva (nymph), which turns into a damselfly. They are closely related to dragonflies, which also have a similar lifecycle but rather different larvae. They don't turn into each other.
Some useful info sites:
http://www.lrdg.org.uk/introduction.php
http://www.twingroves.district96.k12...agonFlies.html
Picture of a damselfly:
Picture of a dragonfly (spot the differences):
Yes, bro budak is correct. You thought you saw dragonfly but actually it is damselfy you saw. They looks alike. you can make a search online.
But you mean you actually have the bugger in your tank for so long...till it turn adult and fly off? how many of your livestock falls into its victim?
Last edited by Quixotic; 11th Jun 2007 at 11:51.
Sorry for my mistake. The damselfly was introduce to my tank when I added in new shrimp to my tank … in the past not sure what it was so just leave it in my tank and if not wrong it take about one week plus to two week to turn into adult damselfly and fly off.
For every one or two day you can see one victim and in the past I thought these casualties due to stress out when transportation…
As the matter of fact, i still see one or two casualties in my tank... I couldn't see any nymph(Looked very hard, until eyes swollen) so i suspect my tank water also got problem... : (
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